Tantroni has a similar appearance to Suspicioni. He is a short Oni, with red skin. He has a large head, with a yellow horn on top of it. He has three, large blue-ish eyes with yellow irises, two in the front of his head, one in the back. He wears a dark grey loincloth with yellow stripes and fluff around his neck.
Tantroni can cause the Inspirited to have a temper tantrum.
Befriended(Yo-kai Watch):"I only lost because I wasn't trying! But...I guess we could be friends."
Loafing:"I need a rest!"
Receiving food (favorite):"More, more!"
Receiving food (normal):"So plain..."
Receiving food (disliked):
Freed from Crank-a-Kai: "I coulda gotten out! Maybe I just didn't want to, OK?! But...let's be friends.
"Tantroni" combines tantrum and oni.
"Gaki" is the same as its origin, but with a katakana syllable replacing the first kanji.
"Pataletoni" is a combination of "pataleta" (tantrum) and "oni".
Tantroni's Japanese name ("Gaki") refers to the Japanese name for preta, or "hungry ghosts". In Buddhism, they are the souls of greedy, gluttonous or otherwise materialistic people who couldn't let go of their desires and thus wallow in the underbelly of the universe, plagued by a constant hunger. In Japanese, spoiled or bratty children are also called "gaki" as an insult.
When snapped in the Yo-kai Cam, his tip is, "It's about time you grew up!"
Tantroni's "random" nicknames in Yo-kai Watch 2 are: Trumpy, Chandler, Chepper, and Hotlink.